Item12583: Update to simple decimal version.

Eliminate the dependency on version, so this extension can be installed
on sites using old versions of perl.


Conflicts:
	MailerContrib/lib/Foswiki/Contrib/MailerContrib.pm

git-svn-id: http://svn.foswiki.org/trunk@17460 0b4bb1d4-4e5a-0410-9cc4-b2b747904278